Carbs leaking oil

[Coyote1]

My Strombergs are leaking oil. I put new o-rings in and was careful not to overfill the dampeners but they still leak. Anyone have any ideas?

 

[poolboy]

I need to ask first, how are you determining that the damper well is at proper level ?

 

[Coyote1]

dampeners were filled so that the plungers stopped 1/4 inch from the screw top.

 

[poolboy]

I was thinking maybe they were overfilled..but no.
Ideas, no, not from me. The O-ring is the seal so unless you put the old ones or a wrong size back in instead, I can't see how oil is getting past it....unless there's a hole in the bottom of the adjuster

 

[TR3driver]

Just a thought: Could the bore have been chewed up so badly when you forced out the retaining washer that it damaged the O-ring on the way back in?

Any chance you put in the wrong size O-ring?

Maybe a hole punched through the adjusting screw? (No idea how that would happen, just trying to be complete.)

Otherwise, I don't see how it could leak, as the cavity is formed by a solid tube with the bottom blocked by the adjusting screw & O-ring.

 

[SkinnedKnuckles]

Are they leaking until empty or does the level just seem low? If you still feel the resistance from the oil about 1/4" until the damper hits the threads on top it's ok regardless of the level you see beforehand.

 

[M_Pied_Lourd]

Hi Larry,

Is this what you replaced?

Is it possible that the O ring you replaced yours with was smaller?

Cheers,
M. Pied Lourd

 

[DrEntropy]

As Randall noted, it HAS to be getting past the O-ring. Either it's the wrong size or been compromised in some way.

This may seem silly on the surface of it, but: if the bore is burred, try using a bamboo chopstick, hacksawn with a slit and some 600 grit wet-or-dry... like honing a cylinder wall. Some light oil and patience. :wink:


<span style="font-style: italic">EDIT: Don't be tempted to use a drill. Do it by hand.</span>

 

[Coyote1]

Thanks guys, several good tips. I'm going to pull it apart and recheck everything. It seems so simple but I guess nothing ever is.